Acidification evidences of no-tilled soils of the central region of Argentina

LAURA ANTONELA ITURRI; DANIEL EDUARDO BUSCHIAZZO; MARTÍN DÍAZ-ZORITA

Ciencia del Suelo

ASOCIACIÓN ARGENTINA DE LA CIENCIA DEL SUELO

Lugar: Ciudad Autónoma de Buenos Aires; Año: 2011 vol. 29 p. 13 - 19

0326-3169

Empiric evidences indicate that agricultural soils of Argentina tend to acidification. The objective of this study was to determine pH values of, since several years, no-tilled and urea-fertilized-agricultural soils of Argentina. Results indicated that both, the actual pH (pHA) and the potential pH (pHP) values were lower in humid than in dry environments. The ratio between ?mean annual precipitation:mean annual temperature? of the sites explained between 60 and 80% of pH values variability. This suggests that climatic conditions were responsible for current soil pH values. The pHA was 1.14 points higher tan pHP in all studied sites (p